A study of the transmission of 10-keV electrons through a ceramic macrochannel

Transmission of 10-keV electrons through a ceramic macrocapillary in the geometry, where the channel axis is oriented parallel to the incident-beam axis, has been studied experimentally. The current and energy spectrum of electrons passing through the channel have been measured depending on the incident beam current and the channel irradiation time. It is demonstrated that the transmission of electrons through a sample depends on the time that has passed after the formation of a conducting carbon deposit on the inner surfaces of both end faces of the channel.